CN103343291A - Method for producing phosphorus weathering resistant steel from limonitic laterite ore - Google Patents
Method for producing phosphorus weathering resistant steel from limonitic laterite ore Download PDFInfo
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- CN103343291A CN103343291A CN2013102806520A CN201310280652A CN103343291A CN 103343291 A CN103343291 A CN 103343291A CN 2013102806520 A CN2013102806520 A CN 2013102806520A CN 201310280652 A CN201310280652 A CN 201310280652A CN 103343291 A CN103343291 A CN 103343291A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 229910001710 laterite Inorganic materials 0.000 title claims abstract description 26
- 239000011504 laterite Substances 0.000 title claims abstract description 26
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 12
- 239000011574 phosphorus Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000007670 refining Methods 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005261 decarburization Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 229910000870 Weathering steel Inorganic materials 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000002817 coal dust Substances 0.000 claims description 12
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000571 coke Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 4
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 9
- 229910052759 nickel Inorganic materials 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000009847 ladle furnace Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 229910000863 Ferronickel Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a method for producing phosphorus weathering resistant steel from limonitic laterite ore. The method comprises steps of preparing ore; preparing sinter; carrying out blast furnace iron making; implementing argon oxygen decarburization (AOD) refining; performing LF (Ladle Furnace) refining; after obtaining molten weathering resistant steel, continuously casting the molten steel into a slab or a billet through a slab or billet continuous casting machine, or furthermore, implementing controlled rolling to the obtained slab or billet through a continuous mill group, so as to produce weathering resistant steel profile or slab. The method has the beneficial effects that the adopted raw material, namely limonitic laterite ore containing nickel and phosphor, is abundant in source and cheap in price, thus saving resource, relieving environmental pollution, recycling waste material and realizing comprehensive utilization; a blast furnace greater than 300m<3> can be used for melting the limonitic laterite ore containing nickel and phosphor, so as to realize long-term large-scale production and improve the production efficiency; the production process of the weathering resistant steel omits a process of converter or electric steel making, thus greatly reducing the production cost of the weathering resistant steel.
Description
Technical field
The present invention relates to the ferrous metallurgy field, particularly, relate to a kind ofly use brown swage laterite to produce the method for phosphorous weathering steel.
Background technology
Weathering steel, it is weather resisting steel, be the low alloy steel between ordinary steel and stainless steel, the steel construction that weathering steel uses in atmosphere as long-term exposure obtains widespread use, constantly research and develop the production method that makes new advances in recent years, in the prior art, weathering steel is smelted the raw material adopt and formed and mainly contain two kinds, first kind: blast-melted, cleaning weathering steel returns steel, high-carbon ferrophosphorus and high purity ferronickel; Second kind: the cleaning weathering steel returns steel, ordinary scrap steel, high-carbon ferrophosphorus and high purity ferronickel, and above raw material is smelted in electric furnace or converter.Fine fodders such as this use iron alloy and steel scrap are as the disadvantage of the smelting process of main raw material, be at first to produce high-carbon ferrophosphorus and high purity ferronickel, cost height, price height, seriously polluted, expend the energy, in addition, nickel is rare and expensive metals in many countries.
Therefore, people attempt to inquire into both economical weathering steel Production Flow Chart: use nickeliferous iron ore as main raw material, go out nickel-contained pig iron with blast-furnace smelting, again with electric furnace or converter smelting weathering steel molten steel.In addition, brown iron type nickel laterite ore is the ore of the abundant nickeliferous and iron of a kind of reserves, and aboundresources is cheap, has sizable recycling and is worth.But brown iron type nickel laterite ore is a kind of low-grade nickeliferous, iron, the mineral association of chromium, aluminium, and iron level is low, and nickel content is low, the phosphorus content height, the big viscosity of the quantity of slag is big when blast-furnace smelting, and molten iron is mobile poor, is difficult to smelt.In addition, in order to produce high-quality weathering steel, after electric furnace or converter operation, adopting the AOD purifying method usually is argon-oxygen-decarburization process (argon oxygen decarburization) and LF(Ladle Furnace) refining techniques, that is to say, use earlier blast furnace, follow-up electric furnace or converter, follow-up AOD stove and/or LF produce the high quality weathering steel again, though this technical process has realized the comprehensive utilization of brown swage laterite, but still not breaking away from electric furnace and converter, cost is still higher.
If can in the production process of weathering steel, can use brown swage laterite as raw material, realize comprehensive utilization; Can thoroughly omit electric furnace and converter again, reduce production costs, for prior art, have great revolutionary meaning undoubtedly.
Summary of the invention
The present invention is exactly in order to solve the above-mentioned problems in the prior art, providing a kind of uses brown swage laterite nickeliferous, phosphorus to smelt and produce low-phosphorous weathering steel as raw material, process raw ore sintering, blast furnace ironmaking, AOD method, LF method, to realize comprehensive utilization, to reduce cost, reduce environmental pollution, enhance productivity.
That is to say that the present invention also is applicable to and uses brown swage laterite to produce phosphorous stainless steel.
To achieve these goals, technical scheme of the present invention is as follows.
A kind ofly use brown swage laterite to produce the method for phosphorous weathering steel, may further comprise the steps:
Step 1: prepare ore: the main component of the brown swage laterite ore of used nickeliferous and phosphorus is as follows: in weight percent content: TFe30-52%, Ni0.4-1.8%, Cr0.8-2.0%, P0.015-0.15%, CaO0.5-2.0%, SiO2 1-15%, MgO1-15%, Al2O3 2-10%;
Step 2: preparation agglomerate: above-mentioned breeze process is broken, after screening and the dry pre-treatment, obtain breeze and the lump ore of certain particle size scope, the coal dust or the coke powder that account for pretreated breeze and lump ore gross weight 3-8% with addition of weight percent content act as a fuel, and the Wingdale of 0.3-5% is as flux, in sinter machine, make agglomerate then, the weight percent content of described each major ingredient of agglomerate is: TFe35.80-56.41%, Cr0.8-3.0%, Ni0.8-3.0%, CaO9.05-12.3%, SiO2 7.22-9.05%, MgO1.36-1.86%;
Step 3: blast furnace ironmaking: with agglomerate, coke, coal dust and Wingdale add blast furnace to be smelted, and the content of coke accounts for the 25-35% that adds high furnace charge gross weight by weight percentage; Coal dust content by weight percentage, account for the 0.5-2% that adds high furnace charge gross weight; The content of Wingdale accounts for the 0.5-8% that adds high furnace charge gross weight by weight percentage; Molten iron temperature: 1450-1550 ℃, basicity of slag: 1.1-1.35 obtains nickeliferous and molten iron phosphorus, and its composition is as follows, in weight percent content: C3-4.5%, and Cr1-3%, Ni1-3%, Si1.0-2.0%, P0.05-0.15%, S0.05-2%, surplus is Fe;
Step 4:AOD refining: the molten iron that uses the AOD method that step 3 is obtained carries out Argon oxygen blast refining, finishes direct reduction and decarburization, removal impurity, and dephosphorization does not keep alloying elements cr;
Step 5:LF refining: use the LF method that the molten steel that step 4 obtains is carried out refining, further remove impurity, add ferromanganese simultaneously, adjust temperature and composition, obtain the weathering steel molten steel, its composition is as follows: in weight percent content: C0.01-0.5%, Si0.3-0.7%, Mn0.3-0.7, P0.05-0.15%, S0.01-0.040%, Cr2-5%, Ni1-3.5%, surplus is Fe.
Can use slab or billet caster that the weathering steel continuous casting of molten steel that obtains is become slab or square billet.
Can also further use the tandem rolling unit to carry out controlled rolling resulting continuous casting steel billet or square billet, produce weathering steel section bar or sheet material.
The present invention has compared with prior art improved to innovation the method for producing weathering steel, compared with prior art, has obtained following beneficial effect;
1. the raw material that uses of the present invention, namely brown swage laterite source nickeliferous, phosphorus is abundant, cheap, can economize on resources, and reduces environmental pollution; The present invention is turned waste into wealth, and has realized the comprehensive utilization of the brown swage laterite of nickeliferous, phosphorus.
2. the present invention can use 300m
3That above blast furnace carries out is nickeliferous, the smelting of the brown swage laterite of phosphorus, realizes long-term large-scale production, has improved production efficiency.
3. in weathering steel Production Flow Chart of the present invention, omit converter or Electric furnace steel making operation, greatly reduced the production cost of weathering steel.
Embodiment
Further the present invention will be described by the following examples.
Embodiment 1
The method that the brown swage laterite of the use of present embodiment is produced phosphorous weathering steel may further comprise the steps:
Step 1: prepare ore: the main component of the brown swage laterite ore of used nickeliferous and phosphorus is as follows: in weight percent content: TFe30%, and Ni0.4%, Cr0.8%, P0.015%, CaO0.5%, SiO2 1%, MgO1%, Al2O3 2%;
Step 2: preparation agglomerate: above-mentioned ore process is broken, after screening and the dry pre-treatment, obtain breeze and the lump ore of certain particle size scope, the coal dust or the coke powder that account for pretreated breeze and lump ore gross weight 3% with addition of weight percent content act as a fuel, and 0.3% Wingdale is as flux, make agglomerate then in sinter machine, the weight percent content of described each major ingredient of agglomerate is: TFe35.8%, Ni0.8%, Cr0.8%, CaO9.05%, SiO2 7.22%, MgO1.36%;
Step 3: blast furnace ironmaking: with agglomerate, coke, coal dust and Wingdale add blast furnace to be smelted, and the content of coke accounts for 25% of the high furnace charge gross weight of adding by weight percentage; Coal dust content by weight percentage, account for and add 0.5% of high furnace charge gross weight; The content of Wingdale accounts for 0.5% of the high furnace charge gross weight of adding by weight percentage; Molten iron temperature: 1450-1550 ℃, basicity of slag: 1.1-1.35 obtains nickeliferous and molten iron phosphorus, and its composition is as follows: in weight percent content: C3%, and Ni1%, Cr1.2%, Si1.0%, P0.05%, S0.05%, surplus is Fe;
Step 4:AOD refining: the molten iron that uses the AOD method that step 3 is obtained carries out Argon oxygen blast refining, finishes direct reduction and decarburization, removal impurity, does not take off P, keeps alloying elements cr;
Step 5:LF refining: use the LF method that the molten steel that step 4 obtains is carried out refining, further remove impurity, add ferromanganese simultaneously, adjust temperature and composition, obtain the weathering steel molten steel, its composition is as follows: in weight percent content: C0.01%, Si0.3%, Mn0.3%, P0.05%, S0.01%, Cr2%, Ni1%, surplus is Fe.
The sintering step of present embodiment uses two stepped start-stop system sinter machines, and sintering area and cooling area all respectively are 30M
2, 1150 ℃ of ignition temperatures, bed thickness 900mm.
The blast furnace useful volume 380M that present embodiment uses
2, cupola well diameter 4.9m, tuyere diameter 95～120mm, 12 of inlet numbers, fan capacity 1500M
3/ min, blast 0.3MPa.
The continuous caster that present embodiment uses is arc 4 stream slab casters.
Embodiment 2
The method that the brown swage laterite nickeliferous, phosphorus that present embodiment uses is smelted low-phosphorous weathering steel, the step that comprises is identical with embodiment 1, but ore composition, the fuel of agglomerate, the main component of flux, blast furnace ironmaking raw material, processing parameter and hot metal composition, AOD is different with the weathering steel composition after the LF refining.
The method that the brown swage laterite of the use of present embodiment is produced phosphorous weathering steel may further comprise the steps:
Step 1: prepare ore: the main component of the brown swage laterite ore of used nickeliferous and phosphorus is as follows: in weight percent content: TFe52%, and Ni1.8%, Cr2.0%, CaO2.0%, SiO2 15%, MgO15%, Al2O3 10%;
Step 2: preparation agglomerate: above-mentioned breeze process is broken, after screening and the dry pre-treatment, obtain breeze and the lump ore of certain particle size scope, the coal dust or the coke powder that account for pretreated breeze and lump ore gross weight 3-8% with addition of weight percent content act as a fuel, and 5% Wingdale is as flux, in sinter machine, make agglomerate then, the weight percent content of described each major ingredient of agglomerate is: TFe56.41%, Cr2.5%, Ni3.0%, CaO12.3%, SiO
29.05%, MgO1.86%;
Step 3: blast furnace ironmaking: with agglomerate, coke, coal dust and Wingdale add blast furnace to be smelted, and the content of coke accounts for 35% of the high furnace charge gross weight of adding by weight percentage; Coal dust content by weight percentage, account for and add 2% of high furnace charge gross weight; The content of Wingdale accounts for 8% of the high furnace charge gross weight of adding by weight percentage; Molten iron temperature: 1450-1550 ℃, basicity of slag: 1.1-1.35 obtains nickeliferous and molten iron phosphorus, and its composition is as follows, in weight percent content: C4.5%, and Cr2.8%, Ni3%, Si2.0%, P0.15%, S2%, surplus is Fe;
Step 4:AOD refining: the molten iron that uses the AOD method that step 3 is obtained carries out Argon oxygen blast refining, finishes direct reduction and decarburization, removal impurity, and dephosphorization does not keep alloying elements cr;
Step 5:LF refining: use the LF method that the molten steel that step 4 obtains is carried out refining, further remove impurity, add ferromanganese simultaneously, adjust temperature and composition, obtain the weathering steel molten steel, its composition is as follows: in weight percent content: C0.5%, Si0.7%, Mn0.7%, P0.15%, S0.040%, Cr5%, Ni3.5%, surplus is Fe.
The sintering step of present embodiment uses two stepped start-stop system sinter machines, and sintering area and cooling area all respectively are 30M
2, 1150 ℃ of ignition temperatures, bed thickness 900mm.
The blast furnace useful volume 380M that present embodiment uses
2, cupola well diameter 4.9m, tuyere diameter 95～120mm, 12 of inlet numbers, fan capacity 1500M
3/ min, blast 0.3MPa.
The continuous caster that present embodiment uses is arc 4 stream billet casters.
In embodiments of the invention 1 and embodiment 2, the AOD argon oxygen refining unit profile of use and converter are approximate, body of heater be placed in can before and after on the backing ring of tumbling, in the bottom side of AOD stove the spray gun that is blown into gas to the bath level direction is housed.
In embodiments of the invention 1 and embodiment 2, use the tandem rolling unit to carry out controlled rolling to resulting continuous casting steel billet or square billet, produced section bar or the sheet material of phosphorous weathering steel smoothly.
Be noted that above embodiment is limited technical scheme of the present invention, protection scope of the present invention is documented among every claim.
Claims (3)
1. a method of using brown swage laterite to produce phosphorous weathering steel is characterized in that, may further comprise the steps:
Step 1: prepare ore: the main component of the brown swage laterite ore of used nickeliferous and phosphorus is as follows: in weight percent content: TFe30-52%, Ni0.4-1.8%, Cr0.8-2.0%, P0.015-0.15%, CaO0.5-2.0%, SiO
21-15%, MgO1-15%, Al
2O
32-10%;
Step 2: preparation agglomerate: above-mentioned breeze stone process is broken, after screening and the dry pre-treatment, obtain breeze and the lump ore of certain particle size scope, the coal dust or the coke powder that account for pretreated breeze and lump ore gross weight 3-8% with addition of weight percent content act as a fuel, and the Wingdale of 0.3-5% is as flux, in sinter machine, make agglomerate then, the weight percent content of described each major ingredient of agglomerate is: TFe35.80-56.41%, Cr0.8-3.0%, Ni0.8-3.0%, CaO9.05-12.3%, SiO2 7.22-9.05%, MgO1.36-1.86%;
Step 3: blast furnace ironmaking: with agglomerate, coke, coal dust and Wingdale add blast furnace to be smelted, and the content of coke accounts for the 25-35% that adds high furnace charge gross weight by weight percentage; Coal dust content by weight percentage, account for the 0.5-2% that adds high furnace charge gross weight; The content of Wingdale accounts for the 0.5-8% that adds high furnace charge gross weight by weight percentage; Molten iron temperature: 1450-1550 ℃, basicity of slag: 1.1-1.35 obtains nickeliferous and molten iron phosphorus, and its composition is as follows: in weight percent content: C3-4.5%, and Cr1-3%, Ni1-3%, Si1.0-2.0%, P0.05-0.15%, S0.05-2%, surplus is Fe;
Step 4:AOD refining: the molten iron that uses the AOD method that step 3 is obtained carries out Argon oxygen blast refining, finishes direct reduction and decarburization, removal impurity, and dephosphorization does not keep alloying elements cr;
Step 5:LF refining: use the LF method that the molten steel that step 4 obtains is carried out refining, further remove impurity, add ferromanganese simultaneously, adjust temperature and composition, obtain the weathering steel molten steel, its composition is as follows: in weight percent content: C0.01-0.5%, Si0.3-0.7%, Mn0.3-0.7, P0.05-0.15%, S0.01-0.040%, Cr2-5%, Ni1-3.5%, surplus is Fe.
2. the brown swage laterite of the use according to claim 1 method of producing phosphorous weathering steel is characterized in that, uses slab or billet caster that the weathering steel continuous casting of molten steel that obtains is become slab or square billet.
3. the brown swage laterite of the use according to claim 2 method of producing phosphorous weathering steel is characterized in that, uses the tandem rolling unit to carry out controlled rolling resulting continuous casting steel billet or square billet, produces weathering steel sheet material or section bar.
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| CN105344959A (en) * | 2015-10-30 | 2016-02-24 | 福建青拓镍业有限公司 | Blast furnace steelmaking continuous casting and rolling stainless steel round bar production system and production technology |
| CN106987776A (en) * | 2017-06-02 | 2017-07-28 | 郑州永通特钢有限公司 | A kind of nickel chromium triangle phosphorus series high-performance non-oriented electrical steel |
| CN112593152A (en) * | 2020-11-26 | 2021-04-02 | 安徽金阳金属结构工程有限公司 | High-strength H-shaped steel for fabricated building and production process thereof |
| CN115261709A (en) * | 2022-08-11 | 2022-11-01 | 山西太钢不锈钢股份有限公司 | Ultralow temperature pressure vessel steel and smelting method thereof |
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| CN104962826A (en) * | 2015-05-30 | 2015-10-07 | 广西盛隆冶金有限公司 | Method for producing corrosion resistance type section steel by using laterite-nickel ore |
| CN105344959A (en) * | 2015-10-30 | 2016-02-24 | 福建青拓镍业有限公司 | Blast furnace steelmaking continuous casting and rolling stainless steel round bar production system and production technology |
| CN105344959B (en) * | 2015-10-30 | 2018-01-16 | 福建青拓镍业有限公司 | Blast furnace steel-making continuous casting and rolling stainless steel round bar production system and production technology |
| CN106987776A (en) * | 2017-06-02 | 2017-07-28 | 郑州永通特钢有限公司 | A kind of nickel chromium triangle phosphorus series high-performance non-oriented electrical steel |
| CN106987776B (en) * | 2017-06-02 | 2018-10-26 | 郑州永通特钢有限公司 | A kind of nickel chromium triangle phosphorus series high-performance non-oriented electrical steel |
| CN112593152A (en) * | 2020-11-26 | 2021-04-02 | 安徽金阳金属结构工程有限公司 | High-strength H-shaped steel for fabricated building and production process thereof |
| CN115261709A (en) * | 2022-08-11 | 2022-11-01 | 山西太钢不锈钢股份有限公司 | Ultralow temperature pressure vessel steel and smelting method thereof |
| CN115261709B (en) * | 2022-08-11 | 2023-08-18 | 山西太钢不锈钢股份有限公司 | Ultralow-temperature pressure vessel steel and smelting method thereof |
| CN115354214A (en) * | 2022-09-30 | 2022-11-18 | 日照钢铁控股集团有限公司 | Method for producing weathering steel with low energy consumption, low carbon emission and low cost |
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